I really like the main mechanic of having to keep moving and shooting to infect other people, and that you used that concept to create a puzzle game. The game is easy to understand and play.
Negative aspects for me were the lack of usage for the ricochet mechanic, I only had to use it once during the whole game, which was a shame because I think you could have created some good puzzles with that. Furthermore, I think the art of the game could have used a bit more polish, since everything feels quite static.
I think it’s also interesting that you could solve certain levels with multiple different routes, which gives the player a bit more freedom.